Correct Answer: Obsreve

Solution : The correct choice is the first option.

Here, the word obsreve is misspelt. The correct spelling is observe, which means to watch carefully, notice, or pay attention to something.

The meanings of the other options are as follows:

• Club: It refers to an association or group of people with a shared interest or purpose.
• Bulb: It refers to a rounded underground storage organ present in plants, such as an onion or tulip bulb, from which the new plant develops.
• Thunder: It refers to the loud, rumbling sound that accompanies a lightning flash during a storm.